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  <title>新的类和接口</title>

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  <h2 class="title">新的类和接口</h2>
  <p class="simpara">
   在 PHP 5.4.0 中引入下列类：
  </p>
  <p class="simpara"><a href="book.spl.html" class="link">SPL</a>:</p>
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   <li class="listitem">
    <span class="simpara">
     <a href="class.callbackfilteriterator.html" class="classname">CallbackFilterIterator</a>
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="class.recursivecallbackfilteriterator.html" class="classname">RecursiveCallbackFilterIterator</a>
    </span>
   </li>
  </ul>
  <p class="simpara"><a href="book.reflection.html" class="link">Reflection</a>:</p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="class.reflectionzendextension.html" class="classname">ReflectionZendExtension</a>
    </span>
   </li>
  </ul>
  <p class="simpara"><a href="book.json.html" class="link">Json</a>:</p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="class.jsonserializable.html" class="classname">JsonSerializable</a>
    </span>
   </li>
  </ul>
  <p class="simpara"><a href="book.session.html" class="link">Session</a>:</p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="class.sessionhandler.html" class="classname">SessionHandler</a>
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="class.sessionhandlerinterface.html" class="classname">SessionHandlerInterface</a>
    </span>
   </li>
  </ul>
  <p class="simpara"><a href="book.snmp.html" class="link">Snmp</a>:</p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="class.snmp.html" class="classname">SNMP</a>
    </span>
   </li>
  </ul>
  <p class="simpara"><a href="book.intl.html" class="link">Intl</a>:</p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="class.transliterator.html" class="classname">Transliterator</a>
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="class.spoofchecker.html" class="classname">Spoofchecker</a>
    </span>
   </li>
  </ul>
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 <div class="up"><a href="migration54.html">从 PHP 5.3.X 迁移到 PHP 5.4.X</a></div>
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